diff --git a/etc/codecs.conf b/etc/codecs.conf
index 2a16832ab8..34ce6fcf2e 100644
--- a/etc/codecs.conf
+++ b/etc/codecs.conf
@@ -1267,6 +1267,7 @@ videocodec ffmjpeg
   fourcc SLMJ       ; SL M-JPEG
   fourcc MVJP       ; Midvid JPEG Video Codec
   fourcc IJLV       ; Intel JPEG Library Video Codec
+  fourcc avi1,avi2
   driver ffmpeg
   dll mjpeg
   out 444P